Hitachi HIDIC MICRO-EH Applications Manual page 167

*1 Received data is defined by either of following 4 ways depending on setting in [7] s+A to [9] s+C.
(a) Start code and data size
s+A : Data length (Byte)
s+B : H80
s+C : H0000
(b) Start and end code
s+A : H0000
s+B : H80
s+C : H80
(c) End code
s+A : H0000
s+B : H0000
s+C : H80
(d) Data length
s+A : Data length (Byte)
s+B：H0000
s+C：H0000
*2 In case of start code used, CPU can fail to receive due to buffer size full if data with wrong start code is sent.
(6) "t" parameter
t+B
[B]
[0] Execution bit:
Set "1" by user program to send data. This bit is reset after communication completed.
[1] Communication completed :
This bit is set "1" when communication completed without error, and reset at communication starting.
[2] Communication failed :
This bit is set "1" when communication fails, and reset at communication starting.
[3] Initialize :
Set "1" by user program to initialize TRNS 0 command. If this bit is on while communication, the communication
is forced to be stopped.
[4] Initialize completed :
This bit is set "1" when initializing completed without error. Initialize bit [3] is reset at this timing.
[5] Receive enabled :
Set "1" by user program if CPU needs to receive data after data sending. This bit is reset after communication
completed.
[6] Parity error flag :
This bit is set "1" when parity error detected.
[7] Framing error :
This bit is set "1" when framing error detected.
[8] Overrun error :
This bit is set "1" when overrun error detected.
*2
( =Start code)
*2
( =Start code)
( =End code)
( =End code)
[A] [9] [8] [7] [6] [5] [4] [3]
5-117
Chapter 5 Instruction specifications
Data length
Start code
Start code
Data length
t
[2] [1] [0] : Set by user
End code
End code